Gas Price Pressure

The price of gas continues to rise, now a litre of gas is over 1.44. To fill my van is well over 120 and best case scenerio might last us 2 weeks. We are trying to think out our travel plans to make the most of the gas we have but it is becoming increasingly difficult to make it work financially. At what point will the gas price level out, will it ever drop again? Why hasn't the government stepped in to lower gas tax which supposedly makes up over 40% of the price we pay at the pumps.